EP2952363B1 - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

Info

Publication number
EP2952363B1
EP2952363B1 EP14746038.0A EP14746038A EP2952363B1 EP 2952363 B1 EP2952363 B1 EP 2952363B1 EP 14746038 A EP14746038 A EP 14746038A EP 2952363 B1 EP2952363 B1 EP 2952363B1
Authority
EP
European Patent Office
Prior art keywords
block
circumferential
tread
width direction
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14746038.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2952363A4 (en
EP2952363A9 (en
EP2952363A1 (en
Inventor
Naohiro OOKAWA
Masayuki KUREBAYASHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2013018734A external-priority patent/JP5722932B2/ja
Priority claimed from JP2013127398A external-priority patent/JP6088365B2/ja
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Publication of EP2952363A1 publication Critical patent/EP2952363A1/en
Publication of EP2952363A9 publication Critical patent/EP2952363A9/en
Publication of EP2952363A4 publication Critical patent/EP2952363A4/en
Application granted granted Critical
Publication of EP2952363B1 publication Critical patent/EP2952363B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0306—Patterns comprising block rows or discontinuous ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • B60C11/125—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern arranged at the groove bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1259—Depth of the sipe
    • B60C11/1263—Depth of the sipe different within the same sipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272—Width of the sipe
    • B60C11/1281—Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0346—Circumferential grooves with zigzag shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0353—Circumferential grooves characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0355—Circumferential grooves characterised by depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/036—Narrow grooves, i.e. having a width of less than 3 mm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles

Definitions

  • the present disclosure relates to a pneumatic tire suited for use in heavy-duty vehicles such as trucks and buses.
  • Patent Literature 1 discloses a "tire having plural [a plurality of] rows of block land portions formed by demarcation by providing plural circumferential grooves extending along tire circumferential direction and plural lateral grooves in communication with adjacent two circumferential grooves; in at least two rows of block land portions adjacent to each other with a circumferential groove therebetween, among the rows of block land portions, the respective rows of block land portions are disposed to be offset with respect to each other in the tire circumferential direction; the extending direction of the groove portion between the block land portions adjacent to each other in the tire widthwise direction is inclined with respect to the tire widthwise direction and tire circumferential direction; and a distance between the block land portions adjacent to each other in the tire widthwise direction is shorter than a distance between the block land portions adjacent to each other in the tire circumferential direction.”
  • the tire with the above structure is capable of efficiently generating significant driving force exerted per unit area at a stepping-in time by reaction between the block land portions, by utilizing the features that the groove portion between the block land portions adjacent to each other in the tire widthwise direction is inclined with respect to the tire circumferential direction and the tire widthwise direction and that the distance between the block land portions is relatively small, while reducing expansion components of rubber due to contact of two block land portions that are adjacent in the tire circumferential direction.
  • the tangent of change in shear force in the circumferential direction in a period from the stepping-in time to a kicking-out time is reduced, whereby sliding wear may be effectively reduced.
  • EP 2371583 discloses a pneumatic tire according to the preamble of Claim 1.
  • the tire with the above structure still inevitably faces the problem of lack of wear resistance and a shortened wear life due to a decrease in an absolute value of a tolerable volume of wear, when the maximum depth of circumferential grooves equipped with wear indicators is controlled to be as relatively shallow as the lower limit specified by the Engineering Design Information (EDI), which is the compliance guideline of the Japan Automobile Tire Manufacturers' Association (JATMA), to reduce the volume of tread rubber relatively so as to reduce the direct material cost and relatively improve rigidity of the blocks defined on the tread surface.
  • EDI Engineering Design Information
  • JTMA Japan Automobile Tire Manufacturers' Association
  • the present disclosure focuses on the above problem and provides improvements over the tire disclosed in Patent Literature 1, and the present disclosure is to provide a pneumatic tire that is imparted with excellent driving performance and wet performance due to a sufficient number or sufficient lengths of peripheries of blocks maintained to extend in the tire width direction within a contact patch of the tread surface of the tire and, at the same time, is also capable, with its effectively improved wear resistance, of exhibiting a long wear life even under the conditions of use in which inputs to the tire are increased by a roaring start, sudden acceleration, or the like under the effect of loads.
  • a pneumatic tire according to Claim 1 an example of which is a radial tire, including a tread surface provided with two or more circumferential grooves, width direction grooves each opening to two of the two or more circumferential grooves that are adjacent in a tread width direction, and a plurality of block rows including a plurality of blocks defined by the two or more circumferential grooves and the width direction grooves.
  • Each of the two or more circumferential grooves extends to be inclined with respect to a tread circumferential direction and bent in several locations and also extends continuously in the tread circumferential direction in, for example, a zigzag, a saw tooth wave, a wave, or a crank shape, wherein respective blocks included in at least two of the plurality of block rows that are adjacent in the tread width direction with one of the two or more circumferential grooves sandwiched therebetween are arranged to be offset relative to each other, i.e., with a "topological difference", in the tread circumferential direction, and the one of the two or more circumferential grooves sandwiched therebetween is smaller in groove width than a width direction groove extending in, for example, a straight line shape between any two of the respective blocks that are adjacent in the tread circumferential direction, the respective blocks each have a block width that is gradually increased from circumferential end portions of the block to a circumferential middle portion of the block in a manner such that widthwise end portions of the block located on both ends
  • a "tread surface” represents a portion of the tire that contacts a flat plate when the tire is mounted with an applicable rim, inflated with a specified air pressure, and then placed upright on the flat plate at a standstill with a load corresponding to a specified mass exerted thereon.
  • an "application rim” represents a rim prescribed for each tire size by an industrial standard which is valid in an area where the tire is manufactured and used.
  • industrial standard include: the Japan Automobile Tire Manufacturers Association Inc. (JATMA) YEAR BOOK in Japan; the European Tire and Rim Technical Organization (ETRTO) STANDARD MANUAL in Europe; the Tire and Rim Association Inc. (TRA) YEAR BOOK in the United States and the like.
  • air may be replaced by a nitrogen gas or other inert gases.
  • the state "when the tire is mounted with an applicable rim, inflated with a specified air pressure, and then placed upright on the flat plate at a standstill with a load corresponding to a specified mass exerted thereon” is referred to as a "maximum load condition.”
  • the state "when the tire is mounted with an applicable rim, inflated with a specified air pressure, and then placed upright on the flat plate at a standstill with a load corresponding to 80 % of a specified mass exerted thereon” is referred to as an "80 % load condition.”
  • the "maximum depth of the (two or more) circumferential grooves” represents the maximum depth of one or more of the circumferential grooves equipped with wear indicators, and the maximum depth herein is set to be close to the lower limit of the groove depth specified by the EDI, which is the compliance guideline of the JATMA, as described above.
  • An "end side” represents one of a plurality of sides of the block having, in a plan view of the tread pattern, a pentagonal or a higher order polygonal shape that is located on each of both end sides in the tread circumferential direction, that extends to be inclined with respect to the tread circumferential direction, and that faces a width direction groove located adjacent to the block.
  • the respective blocks included in the at least two block rows that are adjacent in the tread width direction, each block having a pentagonal or a higher order polygonal contour shape in the plan view, are arranged to be offset relative to each other in the tread circumferential direction, and moreover, the circumferential groove extending in, for example, a zigzag shape between the at least two block rows is smaller in groove width than a width direction groove extending between any two of the respective blocks that are adjacent in the tread circumferential direction.
  • the pneumatic tire according to the disclosed aspect is capable of preventing the blocks from undergoing expansion and deformation by bringing adjacent two blocks into mutual contact in response to collapse and deformation of the circumferential grooves with the small widths within the contact patch under the effect of the large inputs to the tire and, at the same time, is also capable of maintaining wear resistance of the blocks by reducing slippage of the blocks with respect to the contact patch.
  • the pneumatic tire according to the disclosed aspect is capable of further improving rigidity of the blocks and effectively preventing the problem of a short wear life in the tread land portions due to the increased volume of the tread rubber used in each block, by securing the long block length along the tread circumferential direction.
  • edge components extending in the tread width direction are also secured satisfactorily even during empty driving of the vehicle in which the contact patch area of the tread surface of the tire is decreased in the presence of variations in pitch, and the tire is imparted with excellent driving performance and wet performance.
  • the length of the block when the length of the block is more than 2.5 times the shorter one of the two circumferential distances, there is a risk that wear resistance might not be improved as desired under the conditions of use in which inputs to the tire are increased, and moreover, there is no denying that driving performance and wet performance are decreased because edge components extending in the tread width direction within the contact patch of the tread surface are excessively decreased during empty driving of the vehicle. Additionally, when the two circumferential distances are different from each other, the length of the block will be larger than twice or more the shorter one of the circumferential distances.
  • the sipe serves to divide the block and reduces a peak value of wear energy at the trailing time, thereby further improving wear resistance of the tread land portions. Furthermore, according to edges of the sipe, wet performance and driving and braking performance are also improved.
  • a “sipe” represents a groove that is narrow enough to allow wall surfaces of the sipe to closely contact with each other within the contact patch regardless of whether during empty driving or loaded driving of the vehicle and that may extend in a straight line, a curved line, a stepped, a zigzag, or other shapes.
  • a "circumferential middle portion of the block” represents a portion of the block that extends within the range of 25 % of the circumferential length of the entire block from the circumferential center position of the block.
  • the sipe which is provided in each block and opens to the two circumferential grooves that are adjacent to the block, has end positions each formed with a notch that is defined by a curved surface which is convex to an outer side of the block and that is seamlessly connected to a wall surface of the sipe, even when the tire is placed under torque in the direction of rotation and the wall of the sipe is deformed toward an opening direction of the sipe, stress concentration on the bottom of the sipe at the end positions of the sipe is prevented, and accordingly, the bottom of the sipe is protected against cracks effectively.
  • the sipe which extends across the block, with one or more bent portions which may include curved portions
  • inputs from different directions to portions of the block defined by the sipe may be effectively supported by each portion of the block cooperatively at the time of rotation of the tire under load. This prevents unintentional deformation of each portion of the block and eventually, also prevents decreases in wear resistance performance, steering stability, or the like effectively.
  • the degree of opening of the opposing walls of the sipe may be reduced in the vicinity of the tire equatorial plane where contact pressures on the tread surface are increased. This protects the bottom of the sipe against cracks even more effectively.
  • the tread when the tread includes at least two adjacent block rows in a tread central zone, the blocks are supported by one another at the time of rotation of the tire under load.
  • shearing rigidity in the circumferential direction is improved, and moreover, shearing force generated in the blocks due to contact may be controlled to improve wear resistance performance.
  • the blocks included in the of the at least two block rows are prevented from undergoing deformation by improving rigidity of the blocks, and moreover, rigidity of the blocks may be further improved by letting the blocks support one another by bringing opposing groove walls of the circumferential groove extending between the at least two block rows into contact with each other within the contact patch.
  • a tread surface 1 is provided with five circumferential grooves 2, 3, and 4 each extending continuously in the tread circumferential direction and formed in a zigzag shape.
  • the zigzag amplitudes of the circumferential grooves 2, 3, and 4 are gradually reduced from the tire equatorial plane eq to the outer side in the tread width direction.
  • the zigzag amplitude of the pair of circumferential direction grooves 4 formed in the outermost sides in the tread width direction is smaller than the zigzag amplitudes of three circumferential direction grooves 2 and 3 formed in a tread central zone 5.
  • the circumferential direction grooves provided in the tread surface may have any shape that extends to be inclined with respect to the tread circumferential direction and bent in several locations, and the circumferential direction grooves may have other shapes, such as a saw tooth wave, a wave, or a crank shape which are not illustrated, than the illustrated zigzag shape extending to be inclined with respect to each of the tread width direction and the tread circumferential direction.
  • a total of six land portion rows composed of center land portion rows 6, second land portion rows 7, and shoulder land portion rows 8 are defined between the circumferential grooves 2 and 3, between the circumferential grooves 3 and 4, and between the circumferential grooves 4 and tread side edges E, respectively.
  • an internal reinforcement structure or the like of the tire may be substantially the same as those of general radial tires, and illustration thereof is omitted here.
  • width direction grooves 9 are each formed to open to two adjacent circumferential grooves 2 and 3, thereby allowing each center land portion row 6 to form the center block row including a plurality of polygonal blocks 11 each having a pentagonal or a higher order polygonal contour shape in the plan view.
  • Each block 11 includes a pair of widthwise end portions 10 that is located on both ends of the block in the tread width direction.
  • the pair of widthwise end portions 10 is preferably located within the range of 50 % of the circumferential length of the entire block from a circumferential middle portion of the block 11, i.e., from the circumferential center position of the block 11. This allows the block width of the block 11 measured along the tread width direction to be gradually increased from circumferential end portions to the circumferential middle portion of the block 11.
  • a circumferential groove (e.g., the circumferential groove 2 in the figure) extending in a zigzag shape in the tread circumferential direction between two block rows 6 that are adjacent in the tread width direction preferably has a groove depth that is shallower than the maximum depth of the circumferential grooves (e.g., the circumferential grooves 3 in the figure) extending outward of each block row 6 in the tread width direction and equipped with wear indicators, and the circumferential groove 2 extending between the block rows 6 also preferably has a groove width, for example, in the range from 1 to 3.5 mm, that is smaller than that of each circumferential groove 3.
  • a “groove depth” represents a length between an open end of the groove at a surface position of the block and a bottom of the groove measured along the tire radial direction in the state where the tire has been assembled with an application rim and inflated with a specified air pressure with a load corresponding to a specified mass exerted thereon (i.e., under a maximum load condition).
  • a “groove width” represents a length of the groove measured under the same condition at a surface position of the block on the periphery of the groove along a direction perpendicular to the direction in which the groove extends.
  • the circumferential grooves 2 and 3 have different zigzag amplitudes and also have different inclination angles with respect to the tire equatorial plane eq in the respective linear portions.
  • the circumferential groove 2 extending between the two center block rows 6 and 6 that are adjacent in the tread width direction is inclined with respect to each of the tread width direction and the tread circumferential direction, and every two blocks 11 that are included in the center block rows 6 and 6 adjacent in the tread width direction with the circumferential groove 2 sandwiched therebetween and that are adjacent in the tread width direction are arranged to be offset relative to each other in the tread circumferential direction.
  • the circumferential groove 2 is smaller in groove width than a width direction groove 9 extending between two blocks 11 that are adjacent in the tread circumferential direction, and each block 11 has the maximum circumferential length along the tread circumferential direction that is larger than the maximum width of the block along the tread width direction.
  • the width direction groove 9 preferably has a groove width that prevents the width direction groove 9 from contacting a groove wall of a land portion (e.g., a block 11) facing the width direction groove 9 across the circumferential groove 2 at the time of ground contact.
  • such a bock 11 having a pentagonal or a higher order polygonal shape includes end sides 11a located in the circumferential end portions, that is to say, end portions of the block 11 in the tread circumferential direction.
  • the end sides 11a extend in the tread width direction at predetermined inclination angle(s) with respect to the tread circumferential direction and may extend linearly in parallel with each other.
  • Each end side 11a defines a border between the block 11 and a width direction groove 9 that is adjacent to the block 11 in the tread circumferential direction. In other words, each width direction groove 9 is inclined with respect to the tire width direction.
  • circumferential distances a and a1 between the circumferential middle position 11b of each end side 11a of a block 11 included in the center block row 6 and the circumferential middle position 10a of a line connecting the widthwise end portions 10 of the block 11 that are located on both ends of the block 11 in the tread width direction are both twice or more, preferably, from 2 to 2.5 times, of the maximum depth of the circumferential grooves 3 and 4 equipped with wear indicators not illustrated.
  • a "circumferential middle position" of the end side 11a or the line represents a middle position in the tread circumferential direction between endpoints of the end side 11a or the line.
  • the tire illustrated in FIG. 1 is capable of improving rigidity of the blocks 11 included in the center block rows 6 and 6 and thereby capable of significantly improving wear resistance of the tread.
  • the circumferential distance a1 measured from one end side 11a (which is located on an upper side in FIG. 2 ) of the block 11 is equal to the circumferential distance a measured from the other end side 11a (which is located on a lower side in FIG. 2 ) of the block 11.
  • the circumferential distance measured from one end side and the circumferential distance measured from the other end side may also be differentiated according to positions in which the pair of widthwise end portions 10 are formed.
  • the length of the block between the circumferential middle position of one end side and the circumferential middle position of the other end side is set to be 2.5 or less times, preferably, from 2 to 2.5 times, the shorter one of the two circumferential distances different from each other.
  • the respective polygonal blocks 11 included in the center block rows 6 are each provided with a sipe 12 that extends across the block 11 and that opens to the circumferential grooves 2 and 3 at the position of the corresponding pair of widthwise end portions 10.
  • the sipe 12 may include one or more bent portions, and as illustrated in enlargement in FIGs. 3A and 3B , the sipe 12 has end positions each formed with a notch 13 that is defined by curved surfaces which are convex to the outer side of the block 11 and that is seamlessly connected to wall surfaces of the sipe.
  • each sipe 12 herein substantially opens to the circumferential grooves 2 and 3 through the notches 13.
  • the depth of the notch 13 formed in the end position of each sipe is preferably controlled to be smaller in one end position of the sipe that is located closer to the tire equatorial plane eq than in the other end position of the sipe that is located away from the tire equatorial plane eq.
  • the depth of the notch 13 is smaller in one end position of the sipe that is located near the zigzag shaped circumferential groove 2 than in the other end of the sipe that is located near the circumferential groove 3.
  • the respective polygonal blocks 11 included in the center block rows 6 may also be each provided with a sipe 12 that does not include bent portions and that extends linearly along the tire width direction or extends linearly to be inclined with respect to the tire width direction. Furthermore, the notch 13 formed in the opening portion to each circumferential groove of the sipe 12 may be omitted.
  • the circumferential middle position 10a of the line connecting the widthwise end portions 10 refers to the circumferential middle position of a line connecting vertices C1 and C2, which are intersections of extension lines (which are represented by broken lines in the figure) of two sides of the block 11 located on both sides of the notch 13 in each widthwise end portion 10 of the block 11.
  • the outwardly convex curved surface of the notch 13 defined and formed in the end position of each sipe preferably has a radius of curvature R on the surface of the block 11 that is in the range from 1 to 5 mm, and, as illustrated also in FIG. 3B , the sipe 12 preferably has an opening width w with respect to the surface of the block 11 that is in the range from 0.5 to 2 mm.
  • the depth of the notch 13 preferably falls within the range of ⁇ 3 mm with respect to that of the sipe 12.
  • the tread pattern with the tread central zone 5 including the center block rows 6 and 6 or the like that include the blocks 11 and that may be arranged to straddle the tire equatorial plane eq as described above may have any structures without any particular limitation in other zones on the tread surface than the tread central zone 5.
  • the tread pattern illustrated in FIG. 1 includes the second land portion rows 7 each defined between the corresponding zigzag shaped circumferential grooves 3 and 4, and the second land portion row 7 forms a second block row with a lateral groove 14, which is arranged in a constricted portion of the land portion row 7, which extends substantially linearly to open to both the circumferential grooves 3 and 4, and which is smaller in depth than the circumferential grooves 3 and 4.
  • the tread pattern illustrated in FIG. 1 also includes the shoulder land portion rows 8 that each form a shoulder block row with an inclined groove 15, which opens to both the circumferential groove 4 and the tread side edge E. Additionally, any width direction grooves defining blocks included in the second block rows 7 are referred to as lateral grooves 14, and that any width direction grooves defining blocks included in the shoulder block rows 8 are referred to as inclined grooves 15.
  • each lateral groove 14 formed in the second block row 7 is also provided at the bottom of the groove with a sipe 16 extending over the entire length of the lateral groove 14.
  • the sipe 16 provided at the bottom of the groove is preferably a "flask sipe" having a curved bottom surface in order to protect the bottom of the sipe against cracks.
  • respective blocks included in the center block rows 6, and in the second block rows 7 and the shoulder block rows 8 preferably have sizes in the tire circumferential direction that are larger than those in the tire width direction in the tread plan view.
  • each lateral groove 14 is preferably inclined with respect to the tire width direction. Furthermore, each lateral groove 14 preferably has a groove width that is larger than that of any circumferential groove 2. Each inclined groove 15 may extend substantially in parallel with the tire width direction. Each inclined groove 15 has a groove width that may be larger than those of any width direction groove 9 and any lateral groove 14.
  • each circumferential groove 3 may have a groove width that is substantially equal to that of any circumferential groove 4.
  • the circumferential grooves 2 and 3, the width direction grooves 9, the lateral grooves 14, and the inclined grooves 15 all may have the same groove depth.
  • the circumferential distances a and a1 are set to be twice or more the maximum depth of the circumferential grooves 3 and 4 in the blocks 11 included, in particular, in the center block rows 6, the maximum depth of the circumferential grooves 3 and 4 is controlled to be a relatively small, and moreover, the large length of each block 11 helps improve rigidity of the block 11.
  • the blocks 11 included in the two center block rows 6 and 6 come into abutting contact to be supported by one another by bringing the groove walls of the circumferential groove 2 into mutual contact, and by thus preventing the blocks from being deformed to be, for example, protruded or curved, slippages of the blocks with respect to the contact patch is reduced.
  • excellent wear resistance is maintained satisfactorily in the blocks and eventually, in the tread, even under conditions of use in which inputs to the tire are increased.
  • edge components of the blocks that extend in the tread width direction may be controlled as desired simply by appropriately selecting the length of each block 11 in the tread circumferential direction.
  • a graph of FIG. 4 illustrating calculation results for states of changes in the edge components in the tread width direction that may be located within the contact patch during empty driving of the vehicle, with respect to the circumferential length of each block located in the center block rows (hereinafter, referred to as a "center pitch block") at a predetermined pitch, with a current tire product being indicated as a control.
  • the predetermined pitch three kinds of pitch variations, namely, a large, the medium, and a small pitch are adopted,
  • the sipe 12 is provided to extend across each polygonal block 11 included in the center block rows 6 from one widthwise end portion 10 to the other widthwise end portion 10 of the block 11, wear resistance performance and wet performance of the block 11 are further improved.
  • each sipe has the end positions each formed with the notch 13 that is defined by the curved surfaces which are convex to the outer side of the polygonal block 11 and that is seamlessly connected to the wall surfaces of the sipe, even when the opposing walls of the sipe are deformed toward the opening direction at the time of rotation of the tire under load, stress concentration on the bottom of the sipe at the end positions of the sipe is prevented, and accordingly, the bottom of the sipe is protected against cracks effectively.
  • FIG. 9 is a perspective view of one of the blocks illustrated in FIG. 8 , which illustrates the modified example of the pneumatic tire of FIG. 1 .
  • FIG. 9 illustrates the block 11 included in the center block row 6 while omitting the sipe.
  • structures described below with reference to FIGs. 8 to 10 are associated with the modified example of the embodiment of FIG. 1 , some of these structures are also applied to the pneumatic tire illustrated in FIG. 1 according to the invention.
  • the tread surface illustrated in FIG. 8 represents a tread surface under the 80 % load condition.
  • the block 11 has a width BW as the dimension measured in the tire width direction TW, a length BL as the dimension measured in the tire circumferential direction TC, and a depth d as the dimension measured in the tire radial direction TR.
  • the block 11, in the tread plan view has a pentagonal or a higher order polygonal shape with the length BL that is larger than the width BW.
  • each block included in the center block rows 6 and the second block rows 7 has a hexagonal shape
  • each block included in the shoulder block rows 8 has a pentagonal shape.
  • the width BW represents a length between one end and the other end of the block in the tread width direction measured in the tread width direction
  • the length BL represents a length between one end and the other end of the block in the tread circumferential direction measured in the tread circumferential direction.
  • the tread ground-contact width is indicated by reference numeral W
  • the tread ground-contact length is indicated by reference numeral L.
  • the tread ground-contact width W and the tread ground-contact length L are measured under the 80 % load condition.
  • the width BW of each block included in the center block rows 6 is preferably in the range from 15 % to 20 %, inclusive, of the tread ground-contact width W in the tire width direction TW.
  • the length BL of each block included in the center block rows 6 is preferably in the range from 15 % to 35 %, inclusive, of the tread ground-contact length L in the tire circumferential direction TC.
  • the width BW of each block included in the second block rows 7 is preferably in the range from 10 % to 15 %, inclusive, of the tread ground-contact width W in the tire width direction TW.
  • the length BL of each block included in the second block rows 7 is preferably in the range from 15 % to 20 %, inclusive, of the tread ground-contact length L in the tire circumferential direction TC.
  • the width BW and the length BL of each block included in the shoulder block rows 8 are not limited to particular ones and may be the same as the width BW and the length BL of each block included in the center block rows 6 or may be the same 7.
  • FIG. 10 illustrates the shearing modulus in the circumferential direction of the block 11 of FIG. 9 . It should be noted that FIG. 10 illustrates one of the blocks included in the center block rows 6.
  • an overall shearing modulus in the circumferential direction of the plurality of blocks as a whole is defined as G ALL
  • the shearing modulus in the circumferential direction of each block 11 included in the center block rows 6 is defined as G C
  • the shearing modulus in the circumferential direction of each block included in the second block rows 7 is defined as G 2nd
  • the shearing modulus in the circumferential direction of each block included in the shoulder block rows 7 is defined as G SH .
  • a ratio G C / G ALL of G C to G ALL is in the range from 0.27 to 0.33, inclusive, and a ratio G 2nd / G ALL of G 2nd to G ALL is in the range from 0.12 to 0.18, inclusive, and a ratio G SH / G ALL of G SH to G ALL is in the range from 0.49 to 0.61, inclusive.
  • the ratio G C / G ALL is 0.27 or more, and each block 11 included in the center block rows 6 has high rigidity, wear resistance of the center block rows 6 is improved. Furthermore, since torsion rigidity of the center block rows 6 is relatively improved, cornering power is improved, which in turn improves steerability.
  • the ratio G 2nd / G ALL needs to be reduced accordingly, and this need involves the risk of partial wear such as block punch due to accelerated wear in the second block rows 7 subject to self-excited wear, controlling the ratio G 2nd / G ALL to be 0.12 or more allows prevention of such partial wear.
  • the embodiment improves wear resistance and steerability of the tread portion by optimizing the ranges of the ratio G C / G ALL , the ratio G 2nd / G ALL , and the ratio G SH / G ALL . That is to say, in the embodiment, the ranges of the ratio G C / G ALL , the ratio G 2nd / G ALL , and the ratio G SH / G ALL are important features that are to be focused and optimized.
  • the ratio G C / G ALL of 0.27 or more reduces the slippage at the trailing time, thereby improving wear resistance. Especially, central wear occurring when the tire is assembled to a drive axle is effectively reduced. Furthermore, since torsion rigidity of the center block rows 6 is relatively improved, inputs in the lateral direction are decreased, and shoulder wear occurring when the tire is assembled to a steering axle is effectively reduced.
  • the lower limit of the ratio G SH / G ALL herein is determined from the viewpoint of reducing partial wear in the shoulder block rows 8.
  • the upper limits of the ratio G C / G ALL and the ratio G SH / G ALL are determined in accordance with balance of the shearing moduli of the blocks in the circumferential direction. An excessively high upper limit of the ratio G C / G ALL or the ratio G SH / G ALL will result in an excessively small shearing modulus (G 2nd ) in the circumferential direction.
  • a block arranged on the tread surface of FIG. 1 also satisfies the ratio G C / G ALL , the ratio G 2nd / G ALL , and the ratio G SH / G ALL .
  • the relations of the ratio G C / G ALL , the ratio G 2nd / G ALL , and the ratio G SH / G ALL are achieved, for example, by defining the width BW and the length BL of each block included in the center block rows 6, the width BW and the length BL of each block included in the second block rows 7, and the width BL and the length BL of each block included in the shoulder block rows 8, the relations of the ratios of the shearing moduli of the blocks in the circumferential direction may also be achieved by defining the width of each block row.
  • the plurality of block rows includes the center block rows 6 that are adjacent to the circumferential groove straddling the tire equatorial plane eq in the tread half portion, the second block rows 7 that are adjacent to and located outward in the tread width direction than the center block rows 6, and the shoulder block rows 8 that are adjacent to and located outward in the tread width direction than the second block rows 7 and that include the plurality of blocks defined by the circumferential grooves 4, the width direction grooves 15, and the tread side edges E.
  • a width CW of each center block row, a width SW of each second block row, and a width SHW of each shoulder block row are each defined as a mean value of the maximum width of the block row measured along the tread width direction and the minimum width of the bock row measured along the tread width direction
  • the width CW of the center block row, the width SW of the second block row, and the width SHW of the shoulder block row each specifically refer to a value obtained by adding up the maximum width of a block included in the block row that has the maximum width measured along the tread width direction and the minimum width of a block included in the block row that has the minimum width measured along the tread width direction and by dividing the resulting value by 2.
  • Example tires 1 to 3 The pitch length of each block in the tire with the tread pattern illustrated in FIG. 5 was varied to obtain Example tires 1 to 3 including blocks with pitch lengths of 45.8 mm, 58.4 mm, and 65.8 mm, respectively.
  • the Example tires 1 to 3 were not provided with any sipe and each included the circumferential grooves 3 and 4 having the maximum depth of 16.2 mm. Wear energy indexes were obtained for the tires with respect to the cases where the tires were in free rolling, where fore-and-aft acceleration of 0.05 G was inputted to the tires, and where fore-and-aft acceleration of 0.15 G was inputted to the tires, with the tire including the tread pattern illustrated in FIG. 6 being used as a control.
  • FIG. 7 shows results of the Example tires 1 to 3.
  • the maximum depth of the circumferential grooves included in the tread central zone of the control tire was 16.2 mm
  • the maximum depth of the circumferential grooves included in the tread side zones of the control tire was 16.7 mm.
  • Wear energy herein were determined by exerting three levels of driving force to each tire in an indoor tester and by measuring sharing force applied to the tire in the tire circumferential direction and the slippages of the blocks.
  • the wear energy index of the Example tire 1 is advantageously low for the low input of 0.05 G, whereas the Example tire 3 with the large pitch length is advantageous for the high input of 0.15 G.
  • Example tire 3 with the large pitch length exhibits excellent wear resistance for high inputs.
  • Example 4 Example 5 G ALL 155 140 R c 0.3 0.25 R 2nd 0.15 0.2 R SH 0.55 0.55 C / L wear 110 95 2nd wear 100 100 SHO wear 100 100
  • Example 4 having the ratio G C / G ALL of 0.27 or more reduces C / L wear while preventing increases in 2nd wear and SHO wear.
  • Example 6 Example 7
  • Example 8* Example 9* Width CW of center block row 100 100 100 100 Width SW of second block row 42 49 30 70 Width SHW of shoulder block row 59 60 60 60 C / L wear 114 105 100 80 2nd wear 100 100 80 100 SHO wear 100 100 100 100 *Not according to the invention.
  • Examples 6 and 7 exhibit improved wear resistance compared with Examples 8 and 9, which are not according to the invention.
  • each block included in the center block rows 6 and the second block rows 7 has a hexagonal shape
  • each block included in the shoulder block rows 8 has a pentagonal shape in the tread plan view.
  • the embodiment is not limited to this example.
  • each block included in the center block rows 6 and the second block rows 7 may have an octagonal shape.
  • corners of each block may be chamfered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
EP14746038.0A 2013-02-01 2014-01-31 Pneumatic tire Active EP2952363B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013018734A JP5722932B2 (ja) 2013-02-01 2013-02-01 空気入りタイヤ
JP2013127398A JP6088365B2 (ja) 2013-06-18 2013-06-18 タイヤ
PCT/JP2014/000531 WO2014119336A1 (ja) 2013-02-01 2014-01-31 空気入りタイヤ

Publications (4)

Publication Number Publication Date
EP2952363A1 EP2952363A1 (en) 2015-12-09
EP2952363A9 EP2952363A9 (en) 2016-04-27
EP2952363A4 EP2952363A4 (en) 2016-11-23
EP2952363B1 true EP2952363B1 (en) 2018-03-28

Family

ID=51262050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14746038.0A Active EP2952363B1 (en) 2013-02-01 2014-01-31 Pneumatic tire

Country Status (4)

Country Link
US (1) US10596856B2 (zh)
EP (1) EP2952363B1 (zh)
CN (1) CN104955661B (zh)
WO (1) WO2014119336A1 (zh)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3012768B1 (fr) * 2013-11-05 2016-12-23 Michelin & Cie Bande de roulement comportant un bloc presentant une pluralite d'incisions
FR3012767B1 (fr) * 2013-11-05 2015-10-23 Michelin & Cie Bande de roulement comportant un bloc presentant une pluralite d'incisions
JP6243233B2 (ja) * 2014-01-17 2017-12-06 株式会社ブリヂストン タイヤ
JP6050802B2 (ja) * 2014-11-18 2016-12-21 住友ゴム工業株式会社 重荷重用空気入りタイヤ
JP6393162B2 (ja) * 2014-11-21 2018-09-19 住友ゴム工業株式会社 重荷重用空気入りタイヤ
US10124628B2 (en) * 2015-01-06 2018-11-13 Sumitomo Rubber Industries, Ltd. Heavy duty pneumatic tire
JP6383300B2 (ja) * 2015-02-02 2018-08-29 住友ゴム工業株式会社 空気入りタイヤ
JP6504930B2 (ja) * 2015-06-15 2019-04-24 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ
USD792335S1 (en) * 2015-06-18 2017-07-18 The Goodyear Tire & Rubber Company Tire
JP6490542B2 (ja) * 2015-08-26 2019-03-27 住友ゴム工業株式会社 重荷重用タイヤ
JP6657751B2 (ja) * 2015-10-14 2020-03-04 住友ゴム工業株式会社 空気入りタイヤ
JP6665594B2 (ja) * 2016-03-04 2020-03-13 住友ゴム工業株式会社 タイヤ
JP6790495B2 (ja) * 2016-06-24 2020-11-25 住友ゴム工業株式会社 タイヤ
JP6676485B2 (ja) * 2016-06-30 2020-04-08 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ
USD804401S1 (en) * 2016-10-28 2017-12-05 Bridgestone Americas Tire Operations, Llc Tire
JP6828386B2 (ja) * 2016-11-11 2021-02-10 住友ゴム工業株式会社 タイヤ
US20190118592A1 (en) * 2017-10-19 2019-04-25 Infineon Technologies Ag Method, Tire-Mounted TPMS Component, and Machine Readable Storage or Computer Program for Determining a Duration of at Least one Contact Patch Event of a Rolling Tire
US10549587B2 (en) 2017-10-19 2020-02-04 Infineon Technologies Ag Method, component, tire-mounted TPMS module, TPMS system, and machine readable storage or computer program for determining time information of at least one contact patch event of a rolling tire, method for locating a tire
IT201800007028A1 (it) * 2018-07-09 2020-01-09 Battistrada di pneumatici tbr di ruote motrici
JP7115150B2 (ja) * 2018-08-30 2022-08-09 横浜ゴム株式会社 空気入りタイヤ
JP6658934B2 (ja) * 2019-02-27 2020-03-04 住友ゴム工業株式会社 重荷重用タイヤ
CN112347643B (zh) * 2020-11-06 2022-01-21 广东电网有限责任公司佛山供电局 一种gis断路器接触电阻的非线性拟合方法和系统

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104693A (en) 1960-01-25 1963-09-24 Bolenbach Adolf Rubber tire tread grooves and patterns
US4856571A (en) 1987-06-11 1989-08-15 The Goodyear Tire & Rubber Company Pneumatic tire
KR100839139B1 (ko) * 1998-10-30 2008-06-19 피렐리 타이어 소시에떼 퍼 아찌오니 특히 화물차 및 화물차와 유사한 차량용 원동 차량 타이어
DE10208273B4 (de) * 2002-02-26 2007-04-19 Daimlerchrysler Ag Reifen, insbesondere Luftreifen, für Fahrzeuge
JP2004098854A (ja) * 2002-09-10 2004-04-02 Bridgestone Corp 空気入りタイヤ
JP4312141B2 (ja) * 2004-10-13 2009-08-12 住友ゴム工業株式会社 重荷重用ラジアルタイヤ
KR100657287B1 (ko) * 2004-11-19 2006-12-14 삼성전자주식회사 발신자 정보에 의해 인증된 발신자를 위한 화상형성방법및 장치
JP4422622B2 (ja) 2005-01-11 2010-02-24 住友ゴム工業株式会社 重荷重用タイヤ
JP4886288B2 (ja) * 2005-12-08 2012-02-29 住友ゴム工業株式会社 空気入りタイヤ
US20070153274A1 (en) * 2005-12-30 2007-07-05 Asml Netherlands B.V. Optical metrology system and metrology mark characterization device
JP2008290899A (ja) 2007-05-23 2008-12-04 Tokyo Electron Ltd 絶縁体とシリコンとの積層構造体の製造方法、絶縁体とシリコンとの積層構造体、および検出装置
US8851130B2 (en) 2007-05-28 2014-10-07 Bridgestone Corporation Tire having rows of block land portions, lateral grooves and at least three circumferential grooves
JP5219128B2 (ja) 2008-02-22 2013-06-26 株式会社ブリヂストン 空気入りタイヤ
JP2009234362A (ja) * 2008-03-26 2009-10-15 Bridgestone Corp 重荷重用空気入りタイヤ
US9308779B2 (en) * 2008-06-25 2016-04-12 Bridgestone Corporation Tire
JP2010018154A (ja) * 2008-07-10 2010-01-28 Bridgestone Corp タイヤ
US9186936B2 (en) 2008-08-22 2015-11-17 Bridgestone Corporation Tire
JP5331462B2 (ja) * 2008-11-27 2013-10-30 株式会社ブリヂストン タイヤ
US9073391B2 (en) * 2008-11-27 2015-07-07 Bridgestone Corporation Tire
JP5393404B2 (ja) 2009-11-05 2014-01-22 株式会社ブリヂストン タイヤ
JP2012050562A (ja) * 2010-08-31 2012-03-15 Fujifilm Corp 放射線画像撮影装置、放射線画像撮影方法およびプログラム
JP5529683B2 (ja) * 2010-09-02 2014-06-25 株式会社ブリヂストン 空気入りタイヤ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2952363A4 (en) 2016-11-23
EP2952363A9 (en) 2016-04-27
CN104955661B (zh) 2017-06-16
US20150352903A1 (en) 2015-12-10
CN104955661A (zh) 2015-09-30
EP2952363A1 (en) 2015-12-09
US10596856B2 (en) 2020-03-24
WO2014119336A1 (ja) 2014-08-07

Similar Documents

Publication Publication Date Title
EP2952363B1 (en) Pneumatic tire
US10894446B2 (en) Tire
EP3205516B1 (en) Pneumatic tire
EP2899041B1 (en) Pneumatic tire
EP3023269B1 (en) Heavy duty pneumatic tire
EP3069900B1 (en) Heavy duty tire
JP6014092B2 (ja) 空気入りタイヤ
EP3260307B1 (en) Tire
JP5827669B2 (ja) 空気入りタイヤ
JP5852627B2 (ja) 重荷重用タイヤ
JP2012144118A (ja) 空気入りタイヤ
EP3693190B1 (en) Tyre tread
JP2006341769A (ja) 空気入りタイヤ
JP2013039899A (ja) 空気入りタイヤ
JP5722932B2 (ja) 空気入りタイヤ
JP6926780B2 (ja) タイヤ
JP5524008B2 (ja) 空気入りタイヤ
EP4265441A1 (en) Pneumatic tire
JP2018075880A (ja) タイヤ
JP2019199206A (ja) タイヤ
WO2024084903A1 (ja) タイヤ
WO2024084902A1 (ja) タイヤ
JP7131284B2 (ja) タイヤ
JP7183681B2 (ja) タイヤ
EP4265442A1 (en) Pneumatic tire

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150727

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20161020

RIC1 Information provided on ipc code assigned before grant

Ipc: B60C 11/04 20060101ALI20161014BHEP

Ipc: B60C 11/12 20060101ALI20161014BHEP

Ipc: B60C 11/13 20060101ALI20161014BHEP

Ipc: B60C 11/11 20060101AFI20161014BHEP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602014023006

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: B60C0011110000

Ipc: B60C0011040000

RIC1 Information provided on ipc code assigned before grant

Ipc: B60C 11/11 20060101ALI20170811BHEP

Ipc: B60C 11/13 20060101ALI20170811BHEP

Ipc: B60C 11/12 20060101ALI20170811BHEP

Ipc: B60C 11/03 20060101ALI20170811BHEP

Ipc: B60C 11/04 20060101AFI20170811BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20171004

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 983058

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180415

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014023006

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180628

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180328

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180629

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180628

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 983058

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180730

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014023006

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

26N No opposition filed

Effective date: 20190103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190131

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140131

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20220119

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180328

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240119

Year of fee payment: 11